Air-filter.



belongs to the class NllED STAE% PATENT FFE.

LEWS GRAN'K OIDONNELL, OF COSCOB, CONNECTICUT..

AIR-FILTER.

Application filed April :27, 1915.

To aZZ w7wm it may ooncem Be it l nonn that I, Lmvxs G. ODONXELL, a citizen of the United States, residing at Coseob, in the conty oi Fairfield lad State of (onnecticut, have invented certain new and useful mprovements in Air-Filters, of which the following is a specification.

This invention relates to air filters. and of devices that are used in connection With the tnbing arranged in serve compresed air to pnemnatic tools empioyed nsnally en metal structural work for riveting and kindred purposes and operatiens.

The objectof this invfention is the production of an air filter having'par+s i speeial construction and arrangement, inclnding a nnmber of perforated members tlrrongn Which the air must pass from tire inlet to the ontlet, and which are oelieved to be particularly effective in arresting the progress of any solid particles, and preventing them from getting into and injnring tire cool, as they otherw1se wonld il carried directly into the tool by the fiow of air withont the intervention of some protective contrivance.

Tire construction and arrangement of the parts of this invention are set forth in the aecompanying drawings, of which Figure 1 represents a vertical section of all parts assembled. The inlet and outlet pipes are not shown in section. Fig. is a horizontal or cross-section on the brni en lino a2 of. 1. Fig. 3 is a cross-section on lie broken rine y-y ol Fig. 1. Fig. 5: is a top V1e'.

Thronghont the drawings and description the same letter is used to refer to tire same part.

Considering tire drawings, the outer easing A is provided with a nnmber of bolts a, which clamp tire heads B and I) of the casing thereon.

An iniet tube C has a perforated and portion D within the casing and arranged between the casing and the inner shell d. t Wlll here be noted that the shell (Z has its lmver menti: bell-slmpedand open, and that the shell is not perforated.

Within the shell (Z is located a fine ganze poeket E, and within the pocket E is the perforated end portion e et the ontlet tube F. Tire outlet tube is nsnally provided With a snitable snnL-off valve In the lower part of the casing A and below the bell mouth of the'shell d, is a coni- Specification of Letters Patent.

: ma nappen to have Patented Man. 28, 1916.

Seria1No. 24,248.

cal memher or particle direetor G, and below tire dire or is a dished plate 01 taille which has a central opening Il. Tire -onieal memher is arranged as illnstrated. alnove the opening in the baille plate and l elow tire bcll 1nonth of the shell (l. A lzlowoti' pipe h opens into tire casing below the baille plate.

ln the operation of this invention, the air enters tlie casing throngl1 the many perforations et the end 1) of the inlet pipe C. A partiele of any size wonld l')0 eanglnt in the end portion D and would drop downwardly through "lie open end of that portion of tire inlet pipe. Clhe direct rush et fixe air into the casing is now in a great measure stopped,and tlm'airmoves 1nneh more slowlv dmvnwardly and thon cnrves np into the bel] month of the sliell (l. Wl1en the air in its downward rnovennerit reaelres il1e expanding sides or Wall of the shell it is direeted semewhat ontnardl. Partieles of ioreiggnnatter which are at all heavy, continue tl1at ontward movement and de not make the sndden turn npwardiy into the shell d. If, however, an unnsual demand for air results in a to0 rapid flow tlnongh the casing, and partieles are earried np inside the shell, thoy Vlll al1nost certainly l;e arrested there by the line gamme pocket E over perforated end portion 6 of the ontlet pipe, which is the most central member. As tire inlet and ontlet tubes are n-ovided with nnmerons perforations, the air has many openings through wl1ich to pass lr(nn and into tl1ose tubes, and it does not pass as it wonld thronglx a single restrieted opening, tl1at is, at a very liigli veloeity, earrying with in any particles that heen canght np. Any partieles dropping downnardly in the casing A, either fall into lhe dished baille plate 5 whieh lxas its.concme side m5permost, or, tlne partieles descend npon tire conical director and they are directed ontvardly and downwardly to the plate. Let, it be. assumed tlnat tliis inventionhas l een in operaiion for some time, and it is thoughtexpedient to bien ont the dust whieh may have gatl1ered within the casino; both uponthe plate and l elow ir. The blow-oi pipe 7L in oiiened, and rush of air carries ont tire particles that may have f0nnd their way Clown thronelr tire centralopening H of theloaflle plate. 'lhe blowofl' movement of air downwandly in tlxe cas ing is diverted by the direct;qtG ontwardly and downvvardly open the plate, and on its pipe having aperforated end way to the opening the air sweeps orscours the plate and takes With it all the dust and dirt particles whieh may have accumulated thereon. The director, it will be understcod, causes the down-rnshing air t0 strike the plate 9 near the casing and then to pass over the plate to its central opening H,the entire plate being thus svept by air. swing now described this invention and explained the mode of its operation, What I daim is:

1. In an air filter, the combination With a casing, of a shell within the casing having an open bell-mouthed lower end, an inlet pipe having a perforated end portion ar rai1ged between the casing and the said shell, et Wire gauze ocket arranged within the said shell and nving its lower end closed, an outlet pipe having a perfomted end portion arranged within the said gauze pocket, a bafiie plate located in the lower portion of the saidcasing and below the bell mouth of the said shell, and a blow-ofi' opening into the said casing below the said plate.

' 2. In un air filter, .the combination with a casing, of a shell within the casing having an open bell-mouthed low'er end, un inlet portion arranged between the casing and the said shell,

. a, fine gauze pocket, arranged within the said shell and having-dts lower and closed, an

pipe havingfa perforated end portion arranged between (ghe sing and the said shll, gauze pocket, ,rranged within the {4'51'- v a fine said shell and havjngits loWer end losed,zan outlet pipe having a perforated end-por' bien arranged within the said gauze pocket,

a dished bafiie plate arranged in thelowey,

part of the said casing and having its con cave side urranged below the bell mouth of the said shell, the said plate having a. central opening, a conical director arranged centrally above the s aid plate,end a blow-ofl' opening into the%aid casing below the said late. p In testizmony whereof I fiix mysignature in presence of two witness LEWIS GRANT ODONNELL. Witnesses: A

OT1O T. DONNELL, CLARENELMRSIIAHJP the sziid"gauze pocket, a- 

